Python Markdown is a parser library that converts Markdown text to HTML and is embedded across documentation platforms, static site generators, and content management systems, making supply-chain exposure a relevant concern even for a narrowly scoped product. The observed vulnerability surface centers on the markdown parsing and HTML generation layers. Current exploitation activity, severity distribution, and exposure counts are shown alongside this summary.
The number and severity of CVEs published that impact products developed by Python Markdown over time
Signals from CVEs in this vendor scope (1 CVEs).
1 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2025-69534HIGH Python-Markdown version 3.8 contain a vulnerability where malformed HTML-like sequences can cause html.parser.HTMLParser to raise an unhandled AssertionError during Markdown parsin | Mar 5, 2026 | 7.5 | 28 | NO | NO |
Signals from CVEs in this vendor scope (1 CVEs).
An overview of all social media posts that mention a CVE ID that affects a product developed by Python Markdown.
Media articles that mention a CVE ID that affects a product developed by Python Markdown — matched by CVE ID, not by vendor name.